One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,4,8,6)(9,10)(11,17)(12,15)(13,16)(14,18)(19,23)(20,22)(21,24)(25,26,30,33)(27,29,36,39)(28,32,38,31)(34,40,35,37)(1,3,5,8)(2,6,7,4)(9,10,13,16)(11,14,18,17)(12,15,20,22)(19,21,24,23)(25,27,30,36)(26,29,33,39)(28,35,38,34)(31,40,32,37)(1,3)(2,4)(5,8)(6,7)(11,18)(12,20)(14,17)(15,22)(25,28,30,38)(26,31,33,32)(27,34,36,35)(29,37,39,40)(1,4)(2,3)(5,6)(7,8)(9,11)(10,14)(12,19)(13,18)(15,21)(16,17)(20,24)(22,23)(25,28)(26,32)(27,35)(29,37)(30,38)(31,33)(34,36)(39,40) involution — undirected(9,12)(10,15)(11,19)(13,20)(14,21)(16,22)(17,23)(18,24)(25,27)(26,29)(28,35)(30,36)(31,40)(32,37)(33,39)(34,38) involution — undirected(9,10)(11,14)(12,15)(13,16)(17,18)(19,21)(20,22)(23,24)(25,29)(26,27)(28,37)(30,39)(31,34)(32,35)(33,36)(38,40) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.